Denso 234-4948 Oxygen Sensor - Downstream

Denso OE Style Oxygen Sensor for Toyota Highlander

Denso 234-4948 is a heated, specific-fit oxygen sensor built to OE-style dimensions for direct replacement on select Toyota Highlander models. It is designed for downstream placement and supports accurate exhaust feedback for vehicles that need a precise sensor match.

Key Features

• Heated oxygen sensor for faster operating readiness
• Specific fit for direct replacement on listed Toyota Highlander applications
• OE Style design for factory-like fit and sensor placement
• 4-wire configuration with a 27.48 in. wiring harness length
• Built and tested to OE standards for consistent sensor performance
• Uses Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination

OE Style Design and Fitment

Denso’s OE Style product line focuses on exact replacement parts that match original equipment fit and function. For the Toyota Highlander, part number 234-4948 is listed for downstream applications on 2014-2017 and 2018-2019 models, making it a strong choice when you need a direct-fit oxygen sensor for Toyota Highlander downstream replacement service. This part cross-references NTK 24060 for the same application.

What This Oxygen Sensor Helps Address

• Check engine light concerns related to downstream oxygen sensor faults
• Incorrect exhaust oxygen readings that can affect engine management
• Reduced fuel economy caused by a worn or slow-responding sensor
• Emissions test failures tied to sensor performance issues
• Driveability problems associated with inaccurate air-fuel feedback

Installation Notes and Tips

Confirm the downstream sensor location before ordering and match the connector, wire count, and harness length to the original part. For best results, inspect the exhaust threads and wiring routing during replacement, and verify the vehicle application by year, make, model, and position before installation. Denso 234-4948 is a specific-fit replacement for select Toyota Highlander vehicles, so it should be matched to the exact downstream application listed.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for fit and performance consistency. The sensor’s protective trap layer is engineered to help reduce contamination-related wear, supporting long-term reliability in demanding exhaust environments.